T. J. A. A. Eshag, M. M. Merghani, and N. E. Babiker, “Effect of Time and Haemolysis on Prothrombin Time (PT) and Activated Partial Thromboplastin Time (APTT) Measurement on Blood Samples”, J. Drug Delivery Ther., vol. 11, no. 6-S, pp. 114–122, Dec. 2021, doi: 10.22270/jddt.v11i6-S.5252.